Q:

What is "iso" on a camera?

A:

Quick Answer

ISO on a camera stands for International Standards Organization, which is the governing body that sets sensitivity standards for sensors in digital cameras. ISO settings determine how sensitive the camera’s sensor is to light, while taking various types of photos.

  Know More

Full Answer

ISO is roughly analogous to ASA film speed, in which the kind of film used had to have the right kind of light sensitivity in order to take good photos. The lower an ISO setting, the longer the exposure to gather enough light to capture an image. The higher the ISO, the more light the camera’s sensor gathers quickly, as in sports action shots and some types of news photos.

Each time a photographer doubles an ISO setting, the camera needs half as much light to capture the same exposure. Nikon lists the normal range for ISO settings in digital photography as 200 to 1600 ISO. Just as high-speed film caused grain in images, using higher ISO settings increase the amount of noise in digital images. Accordingly, the photographer’s job is to find the best compromise between ISO and shutter speed for a shot. As with film photography, digital photography combines ISO with shutter speed and lens f-stop to produce high-quality photographs.

Learn more about Technology

Related Questions

  • Q:

    How do fuel level sensors work?

    A:

    The fuel level sensor sends a varying signal to the fuel gauge or electronic gadget that triggers the fuel gauge. The components of the sensor, such as float, rod and resistor, work together to give a reading on the level of fuel.

    Full Answer >
    Filed Under:
  • Q:

    How do optical sensors work?

    A:

    Optical sensors work by converting light into an electronic signal. The sensor is attached to a measuring instrument and an electrical trigger. When light strikes the sensor, it trips the trigger, so a measurement is taken.

    Full Answer >
    Filed Under:
  • Q:

    What is a DSLR camera?

    A:

    A DSLR (digital single lens reflex) camera is a more advanced type of digital camera that uses mirrors to reflect the image into a viewfinder. When the shutter release button is pushed, the shutter opens and the mirror moves out of the way to allow light to pass through the lens.

    Full Answer >
    Filed Under:
  • Q:

    When was the camera invented?

    A:

    The first camera, the pinhole camera or camera obscura, was invented by Alhazen, a prominent figure in the field of optics in the Middle Ages. Alhazen lived around the year 1000, but the exact year when he developed the pinhole camera is uncertain.

    Full Answer >
    Filed Under:

Explore